Antique radios, Old Time Radios
FB49
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Country:
United States of America (USA)
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| Identical to |
FB49
= UX897
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| Similar
Tubes |
Normally replaceable-slightly different:
38296
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| Base |
Edison big E27 = 27 mm
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| Was used by |
Industrial |
| Filament |
Direct |
| Description |
This is a ballast tube (baretter or resistance lamp) designed to be placed in series with a circuit to maintain constant current. This tube is listed on page 48 of "The Story of Electronic Development at the General Electric Company". Dated Dec. 10th, 1930. Also available with UX base.
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Dimensions (WHD)
incl. pins / tip |
x 64 x 25 mm / x 2.52 x 0.98 inch |
| Information source |
- - Manufacturers Literature
Tube Lore (II) p. 81 &211
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Just Qvigstad
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